Liquid pump



FIG. 1 is a front elevational view of a liquid pump showing our new design;

FIG. 2 is a right-side/rear/top perspective view thereof;

FIG. 3 is a right-side/front/top perspective view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right-side elevational view thereof, the left side elevational view being a mirror image, except for the power cords shown partially hidden in the upper right of this drawing;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

We claim the ornamental design for liquid pump, as shown and described. 